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Full-Text Articles in Physical Sciences and Mathematics
Determining Temperatures Of Deformation In Mylonites From The Scandinavian Caledonides, With Implications For The Thermal And Kinematic Evolution Of Orogens, Andrea Marilina Wolfowicz
Determining Temperatures Of Deformation In Mylonites From The Scandinavian Caledonides, With Implications For The Thermal And Kinematic Evolution Of Orogens, Andrea Marilina Wolfowicz
Boise State University Theses and Dissertations
The Titanium-in-quartz (TitaniQ) thermobarometer was evaluated in ductilely sheared rocks (mylonites) from the Scandinavian Caledonides in comparison with several other thermometric methods, including: (1) TitaniQ thermometry in cross-cutting quartz veins, (2) garnet-biotite Fe-Mg exchange thermometry, (3) metamorphic phase equilibria, and (4) quartz microstructures as calibrated experimentally and empirically. In all instances, quartz vein temperatures mimic TitaniQ temperatures of the host rocks. Similarly, TitaniQ temperatures of dynamically recrystallized quartz, ranging from ~210°C at the thrust front to 475°C at the deepest structural levels, reflect the best estimate of the final temperature of deformation. Higher temperatures are also preserved locally and more …
Hillslope Asymmetry Maps Reveal Widespread, Multi-Scale Organization, Michael John Poulos
Hillslope Asymmetry Maps Reveal Widespread, Multi-Scale Organization, Michael John Poulos
Boise State University Theses and Dissertations
Hillslope asymmetry is the condition in which oppositely-facing hillslopes within an area have differing average slope angles, and indicates aspect-related variability in hillslope evolution. As such, the presence, orientation, and magnitude of asymmetry may be a useful diagnostic for understanding process dominance. We present a new method for quantifying and mapping the spatial distribution of hillslope asymmetry across large areas. Resulting maps for the American Cordillera of the Western Hemisphere and the western United States reveal that hillslope asymmetry is widespread, with distinct trends at continental to drainage scales. Spatial patterns of asymmetry correlate with latitude along the American Cordillera, …
A 14,000-Year Record Of Wildfire And Alluvial Fan Deposition Reveals Relationships Among Fire, Climate, Vegetation, And Sediment Yields In The Middle Fork Salmon River, Idaho, Kerry Elizabeth Riley
A 14,000-Year Record Of Wildfire And Alluvial Fan Deposition Reveals Relationships Among Fire, Climate, Vegetation, And Sediment Yields In The Middle Fork Salmon River, Idaho, Kerry Elizabeth Riley
Boise State University Theses and Dissertations
Changes in climate influence vegetation distributions and the frequency and severity of fire and post-fire erosion. While the frequency of large fires has increased on all vegetated continents over the last decade, it remains unclear whether recent large fires are extraordinary over millennial timescales. In the Middle Fork Salmon River of central Idaho, over 40% of the watershed has burned in the last 30 years and the subsequent increase in erosion from severely burned hillslopes has produced many large fire-related debris flows. Fires have burned throughout the steep topographic gradient of the watershed that encompasses high elevation sub-alpine and mixed …
Quantifying Pedogenic Carbon Content Within The Boise River Terraces Using Pressurized Calcimetry, Dawn Jarrels, Annika Quick, Jennifer L. Pierce
Quantifying Pedogenic Carbon Content Within The Boise River Terraces Using Pressurized Calcimetry, Dawn Jarrels, Annika Quick, Jennifer L. Pierce
College of Arts and Sciences Poster Presentations
Soil carbon is the third largest carbon pool within the global carbon cycle; however, soil carbon amounts are not well quantified, and exchange rates of soil carbon are not well understood. Soil carbon can be divided into organic carbon and inorganic carbon, where inorganic carbon (pedogenic carbonate) is precipitated during soil formation and accumulates over time in semi-arid and arid environments. Calcic soils within the semiarid regions of the Boise Valley result from active pedogenic accumulation of secondary CaCO3 resulting in prominent 'caliche' layers in soils formed on many of the Boise River terraces. The larger goals of this …
Stratigraphy, Geochronology And Detrital Zircon Provenance Of Two Silicic Ash Layers At Hagerman Fossil Beds National Monument, Idaho, Susan K. Birnbaum, Brock Lipple
Stratigraphy, Geochronology And Detrital Zircon Provenance Of Two Silicic Ash Layers At Hagerman Fossil Beds National Monument, Idaho, Susan K. Birnbaum, Brock Lipple
College of Arts and Sciences Poster Presentations
Hagerman Fossil Beds National Monument (HAFO) is home to the world-famous Hagerman Horse Quarry. This site gives important insight into Pliocene age paleontology. Absolute ages of this site have been elusive, although researchers have assumed the site to be around 3.2 Ma. This study sought to determine more precise ages for the previously documented Hagerman Horse Quarry and Peters Gulch ash layers at HAFO thereby defining a more specific date for the Hagerman fossil assemblage, and to describe and interpret their sedimentary horizons. Detailed stratigraphic columns were created to describe sedimentary layers and establish marker beds. The sedimentology and stratigraphy …
Searching For Pre-Lan Na Cities In The Golden Triangle Area, Thailand And Laos, Spencer H. Wood
Searching For Pre-Lan Na Cities In The Golden Triangle Area, Thailand And Laos, Spencer H. Wood
Spencer H. Wood
No abstract provided.